Vial plug



FIG. 1 is a front and right side perspective view of a vial plug,showing my new design;

FIG. 2 is a back side elevational view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a bottom plan view thereof; and

FIG. 5 is a cross-sectional view thereof, taken along line 5--5 of FIG.3.

The left side of the vial plug is identical to the right side.

The ornamental design for a vial plug, as shown and described.